Atherosclerotic plaques: is endothelial shear stress the only factor?

Area of Science:

• Cardiovascular science
• Biomedical engineering
• Mechanobiology

Background:

• Atherosclerosis initiation is often linked to abnormal shear stress patterns.
• Clinical evidence suggests plaque formation occurs even in areas with steady, high shear stress, challenging current theories.
• This indicates other hemodynamic factors beyond shear stress may contribute to atherosclerosis.

Purpose of the Study:

• To propose a new hypothesis for atherosclerosis development.
• To investigate the combined effect of wall shear stress and circumferential stress waves.
• To identify the angular phase difference as a potential determinant of plaque formation.

Main Methods:

• Review of existing literature on atherosclerosis and hemodynamics.
• Formulation of a hypothesis based on combined hemodynamic forces.
• Theoretical analysis of the angular phase difference between shear stress and circumferential stress waves.

Main Results:

• Current models attributing atherosclerosis solely to shear stress may be incomplete.
• A novel hypothesis suggests the angular phase difference between wall shear stress and circumferential stress waves is a critical factor.
• Positive angular phase difference values may correlate with increased plaque formation risk.

Conclusions:

• Deviations from normal shear stress alone are insufficient to explain atherosclerosis.
• The interplay between wall shear stress and circumferential stress waves, quantified by angular phase difference, offers a more comprehensive explanation.
• This theory could revolutionize understanding of endothelial mechanotransduction and lead to new diagnostic tools.